1 Features
• AEC-Q100 qualified for automotive applications
– Temperature grade 1: –40°C to +125°C, TA
– Device HBM ESD classification level 2A
– Device CDM ESD classification level C6
• Low offset voltage: ±125 μV
• Low offset voltage drift: ±0.3 μV/°C
• Low noise: 10.8 nV/√Hz at 1 kHz
• High common-mode rejection: 130 dB
• Low bias current: ±10 pA
• Rail-to-rail input and output
• Wide bandwidth: 4.5 MHz GBW
• High slew rate: 21 V/μs
• High capacitive load drive: 1 nF
• MUX-friendly/comparator inputs
– Amplifier operates with differential inputs up to
supply rail
– Amplifier can be used in open-loop or as
comparator
• Low quiescent current: 560 μA per amplifier
• Wide supply: ±1.35 V to ±20 V, 2.7 V to 40 V
• Robust EMIRR performance

2 Applications
• Optimized for AEC-Q100 grade 1 applications
• Infotainment and cluster
• Passive safety
• Body electronics and lighting
• HEV/EV inverter and motor control
• On-board (OBC) and wireless charger
• Powertrain current sensor
• Advanced driver assistance systems (ADAS)
• High-side current sensing

3 Description
The OPAx991-Q1 family (OPA991-Q1, OPA2991-Q1,
and OPA4991-Q1) is a family of high voltage (40 V)
general purpose operational amplifiers for automotive
application. These devices offer exceptional DC
precision and AC performance, including rail-to-rail
input or output, low offset (±125 μV, typical), low offset
drift (±0.3 μV/°C, typical), low noise (10.8 nV/√Hz and
1.8 μVPP), and 4.5-MHz bandwidth.
Unique features such as differential and commonmode
input-voltage range to the supply rail, high
output current (±75 mA), high slew rate (21 V/μs), and
high capacitive load drive (1 nF) make the OPAx991-
Q1 a robust, high-performance operational amplifier
for high-voltage automotive applications.
The OPAx991-Q1 family of op amps is available in
standard packages (such as SOT-23, SC70, SOIC,
VSSOP, and TSSOP) and is specified from –40°C to
125°C.